Yellow

Yellow is an achievement in GRIS. The player can get this achievement by simply completing chapter 4 of the game.

Appearance
It appears to be a yellow dot.

Trivia

 * The meaning of the achievement/color is anger. Given that Gris traverses into her mind from the five stages of grief, and that this is the fourth chapter after the prologue (which is denial, that is gray), she is going into acceptance.
 * The hex code for the color is #fabb08.